
SMC CD85N2550CB (CD85N25-50C-B) - Mini Air Cylinder, 25 mm Bore, 50 mm Stroke
SMC CD85N2550CB Mini Air Cylinder — 25 mm bore, 50 mm stroke, air cushion, band-mount auto switch. SMC C85 series ISO 6432 mini air cylinder, double-acting single rod, basic (integral clevis) 'N' mounting with built-in magnet ('D') for auto switch detection. Bore 25 mm, stroke 50 mm - a standard o25 stroke (standard range: 10, 25, 40, 50, 80, 100, 125, 160, 200, 250, 300 mm). The 'C' suffix denotes air cushion, which SMC offers only on the 'N' mounting type and only for bores o10 to o25. 'B' = band mounting for auto switches; auto switches and bands are ordered separately. Official SMC specifications: fluid air; action double-acting, single rod; proof pressure 1.5 MPa; maximum operating pressure 1.0 MPa; piston speed 50 to 1500 mm/s; ambient and fluid temperature -20 to 80 C, restricted to -10 to 60 C because of the built-in magnet; lubrication not required. Bore 25 mm details: piston rod diameter 10 mm, piston rod thread M10 x 1.25, port size G 1/8. Weight (air cushion): basic 286 g plus 18.4 g per 10 mm of stroke.
MPN: CD85N25-50C-B · SKU: CD85N2550CB
CD85N25-50C-B Applications
The air-cushion version decelerates the piston before it reaches the end cover, so it suits higher-speed or higher-inertia strokes where a rubber bumper alone would be noisy or would shorten cylinder life. Common uses include pushers, diverters, gates and clamps on packaging and assembly equipment. Cushion needle valves let the deceleration be tuned on site. The built-in magnet works with band-mounted auto switches to confirm the extended and retracted positions for PLC sequencing.
CD85N25-50C-B Specifications
| Brand | SMC | Manufacturer Part No. | CD85N25-50C-B |
| Bore | 25 mm | Stroke | 50 mm |
| Series | C85 (ISO 6432 Mini Air Cylinder) | Action | Double acting, single rod |
| Mounting Type | Basic (integral clevis), 'N' type | Built-in Magnet | Yes (D) |
| Auto Switch Mounting | Band mounting (B) | Cushion | Air cushion (C) |
| Fluid | Air | Proof Pressure | 1.5 MPa |
| Max. Operating Pressure | 1.0 MPa | Piston Speed | 50 to 1500 mm/s |
| Ambient and Fluid Temperature | -20 to 80 C (built-in magnet: -10 to 60 C) | Piston Rod Diameter | 10 mm |
| Piston Rod Thread | M10 x 1.25 | Port Size | G 1/8 |
| Lubrication | Not required | Standard | ISO 6432 / CETOP RP52P |
CD85N25-50C-B Datasheet & Manual
Download Datasheet & ManualSMC CD85N2550CB · PDF · Official SMC documentTrusted by




